To this object, in connexion with the natural history of the country, I devoted the remainder of the year, and a part of the following year. I soon found, after reaching the mines, that I had many coadjutors in the business of collecting specimens, in the common miners, some of whom were in the habit of laying aside for me, any thing they found, in their pits and leads, which assumed a new or curious character. Inquiries and applications relative to the mineralogy and structure of the country were made, verbally and by letter, from many quarters. I established my residence at Potosi, but made excursions, from time to time, in various directions. Some of these excursions were fruitful of incidents, which would be worth recording, did the cursory character of these reminiscences permit it. On one occasion, I killed a horse by swimming him across the Joachim river, at its mouth, whilst he was warm and foaming from a hard day's ride. He was put in the stable and attended, but died the next day, as was supposed, from this sudden transition. There was scarcely a mine or digging in the country, for forty miles around, which I did not personally examine; and few persons, who had given attention to the subject, from whom I did not derive some species of information. The general hospitality and frankness of the inhabitants of the mine country could not but make a favourable impression on a stranger. The custom of riding on horseback, in a region which affords great facilities for it, makes every one a horseman and a woodsman, and has generated something of the cavalier air and manners. But nothing impressed me more, in this connexion, than the gallant manner, which I observed here, of putting a lady on horseback. She stands facing you, with the bridle in her right hand, and gives you her left. She then places one of her feet in your left hand, which you stoop to receive, when, by a simultaneous exertion and spring, she is vaulted backwards into the saddle. Whether this be a transmitted Spanish custom, I know not, but I have not observed it in the French, or American settlements west of the Alleghanies.